GALAXY FORMATION IN LAMBDA COLD DARK MATTER MODEL

Abstract

The present work adapts the lambda cold dark matter ΛCDM model for simulating 106 dark matter and 106 gas particles to form galaxies inside a box of size (70Mpc/h)3. The simulation is shown from high redshift z=10(1.2Gyr.) after the Big Bang to the low redshift z=0(13.4Gyr.) which represents the present day. The position of the particles and the temperature-density relations were studied at each epoch. It is found that the galaxies formation start at low redshift z=5 and the gas cooled at 104 K. The web construction of voids, filaments and clusters of galaxies were observed clearly at z=0. Sixteen processors of high performance supercomputer of Nottingham University-England were used in the simulation and the run took more than one day.